vocabulary Flashcards
(23 cards)
Vertebrates
an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
Invertebrates
an animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc. The invertebrates constitute an artificial division of the animal kingdom, comprising 95 percent of animal species and about 30 different phyla.
Consumer
a person who purchases goods and services for personal use.
Ganglion
a structure containing a number of nerve cell bodies, typically linked by synapses, and often forming a swelling on a nerve fiber.
Gut
The gastrointestinal tract is an organ system within humans and other animals which takes in food
Coelom
the body cavity in metazoans, located between the intestinal canal and the body wall.
Bilateral Symmetry
the property of being divisible into symmetrical halves on either side of a unique plane.
Radial Symmetry
symmetry around a central axis, as in a starfish or a tulip flower.
Asymmetry
lack of equality or equivalence between parts or aspects of something; lack of symmetry.
Sponges
Sponges, the members of the phylum Porifera, are a basal Metazoa clade as a sister of the Diploblasts.
Cnidarians
an aquatic invertebrate animal of the phylum Cnidaria, which comprises the coelenterates.
Flatworms
The flatworms are a phylum of relatively simple soft-bodied invertebrate animals.
Roundworms
The nematodes or roundworms constitute the phylum Nematoda. They are a diverse animal phylum inhabiting a broad range of environments.
Mollusks
an invertebrate of a large phylum which includes snails, slugs, mussels, and octopuses.
Open circulatory system
Open circulatory systems (evolved in crustaceans, insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system.
Closed circulatory system
Vertebrates, and a few invertebrates, have a closed circulatory system.
Annelid worms
The annelids, also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches.
Exoskeleton
a rigid external covering for the body in some invertebrate animals, especially arthropods, providing both support and protection.
Compound eye
an eye consisting of an array of numerous small visual units, as found in insects and crustaceans.
Antenna
either of a pair of long, thin sensory appendages on the heads of insects, crustaceans, and some other arthropods.
Metamorphosis
(in an insect or amphibian) the process of transformation from an immature form to an adult form in two or more distinct stages.
Endoskeleton
an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
Water vascular system
(in an echinoderm) a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels.
